[Please help] X399 TaiChi BIOS problem? Ryzen Mast

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   Hi all i recently change to Asrock x399 Taichi for my TR1900x but encounter some problems, spent a lot of time but no use, please help!

1.Wrong temp sensor lead to unnecessary CPU underclock?
I notice the cpu temp shown in BIOS is wrong, it say 7x-8x degree when I turn on my PC, but actually it is just around 3x - 40 C (shown in Ryzen master and HW Monitor.) 
During prime95, CPU will underclock and I guess this is due to the thermal protection because BIOS think cpu is over heat >100C (rmb even 3x degree BIOS though is 7x degree)
It leads to a problem that I cannot load heavy program at full speed.

2. Ryzen Master cannot control the voltage and clock rate
Becasue my water cooling AIO is not very good, I like to de-voltage the CPU at around 1.25V to run at base@3.8GHz to lower the temp. Everytime when I want to apply the setting, ryzen master request me to restart my PC, after restarting nothing is changed and if I apply the setting again Im requested to restart my PC, like a loop but nothing works.
(PS: I reset and flash the BIOS, ryzen works. But after a day it doesnt work again. I dont want to infinitely reflash bios every day.....)

Anyone have similar problem? how to solve it? thanks
so much

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fiyeroleung Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 20 Sep 2018 Status: Offline Points: 3	Post Options Post Reply Quote fiyeroleung Report Post Thanks(0) Quote Reply Topic: [Please help] X399 TaiChi BIOS problem? Ryzen Mast Posted: 20 Sep 2018 at 3:00pm
	Hi all i recently change to Asrock x399 Taichi for my TR1900x but encounter some problems, spent a lot of time but no use, please help! 1.Wrong temp sensor lead to unnecessary CPU underclock? I notice the cpu temp shown in BIOS is wrong, it say 7x-8x degree when I turn on my PC, but actually it is just around 3x - 40 C (shown in Ryzen master and HW Monitor.) During prime95, CPU will underclock and I guess this is due to the thermal protection because BIOS think cpu is over heat >100C (rmb even 3x degree BIOS though is 7x degree) It leads to a problem that I cannot load heavy program at full speed. 2. Ryzen Master cannot control the voltage and clock rate Becasue my water cooling AIO is not very good, I like to de-voltage the CPU at around 1.25V to run at base@3.8GHz to lower the temp. Everytime when I want to apply the setting, ryzen master request me to restart my PC, after restarting nothing is changed and if I apply the setting again Im requested to restart my PC, like a loop but nothing works. (PS: I reset and flash the BIOS, ryzen works. But after a day it doesnt work again. I dont want to infinitely reflash bios every day.....) Anyone have similar problem? how to solve it? thanks so much